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(N0 Model.)

J. H. BLESSING.

STEAM HEATING APPARATUS.

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lE STATES ATEN'T Christi.

JAMES H. BLESSING, OF ALBANY, NEW YORK.

STEAM H EATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 290,662, dated December 25, 1883.

To all whom it may concern.-

Be it known that 1, JAMES H. BLESSING, of the city of Albany, county of Albany, State of New York, have invented a new and useful Improvement in Steam-Heating Apparatus, of which the following is a full,'true, and eXact description, reference being had to the accompanying drawing, which shows a general view of the apparatus, partly in section.

My invention is designed to enable a heating-coil, which may be placed below the water-level of the boiler, to be readily cleared of condensed water without the necessity of the use of an automaticreturn-steam trap.

My invention will be readily understood from the accompanying drawing, in which A represents the boiler; B, a coil below the water-level of the boiler; E, a coil above the water-level of the boiler; D, the main steam-supply pipe; L, the return-pipe.

In the return-pipe M, from the coil B, is placed the receiver 0, which must be above the water-level of the boiler, and as high above it as it can be conveniently located.

Between the steam-pipe D and the returna pipe M is placed the by-pass' or connection H,

provided with valve G, which pipe should be above the water-level of the boiler. The circulation of water or steam to and fro from the receiver 0 is controlled by check-valves F and G.

The operation of my apparatus can now be .readily understood. Supposing atthe time of starting the apparatus in the morning the radiator B to belilled with water. The valve G, which is normally closed, is then opened, and

(No model.)

the valves K closed. Thereupon the water will flow back through the tube N and checkvalve G, emptying the receiver 0, and will finally stand in the tube N at or aboutthe waterlevel of the boiler. The valve G is then closed and the valve K opened. A vacuum will then be formed in the receiver 0 by condensation, and the checlcvalve G closing, the receiver will be filled with water from the radiator B. Then, by closing K and opening the valve G again, the water in C will be returned once more to the boiler, and this operation can be repeated until the radiator B is clear. When the water has been substantially removed from the radiator B, the valve G is permanently closed and the valve K left open. Then the chamber 0 will continue to automatically keep the radiator B clear of water.

A slight vacuum forming in the chamber C will cause the water to flow into it from the receiver B until the height of the columninNis sufficient to open the check-valve G, when it will flow to the boiler, and a vacuum then ensuing, a slight additional amount of Water will be returned into the vessel 0.

lVhat I claim as my invention, and desire to secure by Letters Patent, is-

The combination of the boiler, the steamsupply and return pipes, the radiator B, con

nection M, vessel 0, check-valves F and G, and

bypass H, provided with valve G, substantially as described.

JAMES H. BLESSING. Witnesses:

JOHN W. NVHEELooK, WILLIAM LACY. 

